1987701608 has 16 divisors (see below), whose sum is σ = 3946172580. Its totient is φ = 935388928.

The previous prime is 1987701601. The next prime is 1987701613. The reversal of 1987701608 is 8061077891.

It can be written as a sum of positive squares in 2 ways, for example, as 1886859844 + 100841764 = 43438^2 + 10042^2 .

It is not an unprimeable number, because it can be changed into a prime (1987701601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7307591 + ... + 7307862.

Almost surely, 2^1987701608 is an apocalyptic number.

It is an amenable number.

1987701608 is a deficient number, since it is larger than the sum of its proper divisors (1958470972).

1987701608 is a wasteful number, since it uses less digits than its factorization.

1987701608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14615476 (or 14615472 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 47.

The square root of 1987701608 is about 44583.6473160283. The cubic root of 1987701608 is about 1257.3332378095. Note that the first 3 decimals are identical.

The spelling of 1987701608 in words is "one billion, nine hundred eighty-seven million, seven hundred one thousand, six hundred eight".